Lg Chem, Ltd

Lg Energy Solution, Ltd.

Seoul National University

Pohang University of Science and Technology Foundation

Yeonju Lee

Jonghyun Chae

Daeil Kim

Lucia Kim

Kyoung Hoon Kim

Seungha Kim

Youngcheol Choi

Sung Soo Yoon

Jong-Chan Lee

Kyung Oh Kim

Jung Yun Choi

Moon Jeong Park

Chul Woong Kim

Jong Young Choi

Jeongae Yoon

Donggyun Kang

Jehoon Lee

Na Kyung Kim

Daun Jeong

Sujee Kwon

Ha Young Jung

Suhyun Cho

Gyuha Jo

Harim Jeon

Jongheon Kwak

Provided is a copolymer comprising an irregularly arranged structure of a repeating unit of the following Chemical Formula 1 and a repeating unit of the following Chemical Formula 2, and a repeating unit of the following Chemical Formula 3 present at least at one end of the structure: and is characterized by having an improved elongation and also having a high weight average molecular weight while maintaining intrinsic properties of a polylactic acid. Also provided are methods of preparing the copolymer.

Copolymer and preparation method thereof

A polymer material for a lithium secondary battery having ionic conductivity and electronic conductivity at the same time, and a method for preparing the same. The polymer material includes a polythiophene-based polymer and a conductive polymer, and the polymer material may be formed by forming a polythiophene-based polymer, forming a conductive polymer, and heat-treating the polythiophene-based polymer and the conductive polymer.

Lithium secondary battery polymer material and manufacturing method therefor

A polymer solid electrolyte having high ion conductivity, heat resistance and dimensional stability, and having excellent oxidation stability and voltage stability, and a lithium secondary battery including the same.

Polymeric solid electrolyte and lithium secondary battery comprising same

A solid electrolyte composition for a lithium secondary battery including a fluorine-based polymer having grafted thereon a unit comprising alkylene oxide group and a crosslinkable functional group. The polymer may be formed by a process including grafting a monomer on a fluorine-based polymer, where the monomer includes alkylene oxide group and a crosslinkable functional group. Also disclosed is a solid electrolyte for a secondary battery formed by thermally curing the composition. By graft copolymerizing a monomer including alkylene oxide group and a crosslinkable functional group on a fluorine-based polymer having high lithium ion conductivity, the solid electrolyte is capable of providing a solid electrolyte for a secondary battery having significantly enhanced solid electrolyte ion conductivity and electrochemical stability.

Secondary battery solid electrolyte composition and solid electrolyte prepared therefrom

A polymer electrolyte including a poly(ethylene oxide) (PEO) containing polymer; and a lithium salt, wherein a terminal of the poly(ethylene oxide) containing polymer is substituted with a sulfur compound functional group, a nitrogen compound functional group or a phosphorus compound functional group, and a method for preparing the same and a battery containing the same.

Polymer electrolyte and preparation method therefor

The present invention relates to a polymer electrolyte of a multi-layer structure and an all solid-state battery comprising the same, wherein the polymer electrolyte can exhibit an effect capable of stably operating in the high voltage positive electrode and in the low voltage negative electrode, when using the polymer solid electrolyte having a multi-layer structure, which includes the first polymer electrolyte layer and the second polymer electrolyte layer of the present invention, and the all solid-state battery containing it is applicable in the battery field of electric vehicle in which high capacity and high-power battery are used.

Multi-layer structure polymer solid electrolylte and all solid-state battery comprising the same

A polymer solid electrolyte having high ion conductivity and interfacial stability is provided. An additive including an organic compound having a highest occupied molecular orbital (HOMO) energy of &#x2212;8.5 eV or higher is used, which facilitates film formation in a positive electrode due to low oxidation potential. The resulting polymer solid electrolytes have enhanced film formation on the surface of a positive electrode surface and enhanced interfacial stability, while maintaining battery performance. Lithium secondary battery having enhanced performance are also described.

Polymer solid electrolyte and lithium secondary battery comprising same

A solid polymer electrolyte having high mechanical strength and ion conductivity, and a lithium secondary battery including the same.

Solid polymer electrolyte and lithium secondary battery comprising same

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Daejeon, South Korea

Yeonju Lee